WO2023148640A1 - Système de fonctionnement d'une plieuse à couteau - Google Patents

Système de fonctionnement d'une plieuse à couteau Download PDF

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Publication number
WO2023148640A1
WO2023148640A1 PCT/IB2023/050897 IB2023050897W WO2023148640A1 WO 2023148640 A1 WO2023148640 A1 WO 2023148640A1 IB 2023050897 W IB2023050897 W IB 2023050897W WO 2023148640 A1 WO2023148640 A1 WO 2023148640A1
Authority
WO
WIPO (PCT)
Prior art keywords
knife
folding rollers
knife blade
operating
driving unit
Prior art date
Application number
PCT/IB2023/050897
Other languages
English (en)
Inventor
Sanjay Madhav DANDEKAR
Datta Hari DESHPANDE
Original Assignee
Dandekar Sanjay Madhav
Deshpande Datta Hari
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dandekar Sanjay Madhav, Deshpande Datta Hari filed Critical Dandekar Sanjay Madhav
Publication of WO2023148640A1 publication Critical patent/WO2023148640A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H45/00—Folding thin material
    • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
    • B65H45/18—Oscillating or reciprocating blade folders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2513/00—Dynamic entities; Timing aspects
    • B65H2513/10—Speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2513/00—Dynamic entities; Timing aspects
    • B65H2513/10—Speed
    • B65H2513/11—Speed angular

Definitions

  • the present invention relates to a knife folder. More specifically, the present invention relates to a system for operating a knife folder.
  • a folding machine is used to perform the paper folding operation to create inserts or outserts widely applied in pharmaceutical or manufacturing industries.
  • some types of folding machines are roller folders, knife folders and the like.
  • the knife folder (200) includes a knife blade (20'), a stopper (120') and one or more pairs of folding rollers (40a' and 40b').
  • the knife blade (20') is operated by a first driving unit (21'), such as a linear actuator, and the folding rollers (40a' and 40b') are operated by a second driving unit (22').
  • the knife blade (20') is movable between a non-operating knife position (20a') (as shown in figure la) and an operating knife position (210b) (as shown in figure lb).
  • the knife folder (200) folds an intermediate item (50') as shown in figures la and lb.
  • the intermediate item (50') is a sheet with one or more folds.
  • the intermediate item (50') is moved on (over) the folding rollers (40a' and 40b') for folding the intermediate item (50') by the knife folder (200).
  • the knife blade (20') is at the non-operating knife position (20a)
  • the intermediate item (50') is fed towards the knife blade (20') through two or more feeding rollers (not shown in figures).
  • the movement of the intermediate item (50) is restricted by the stopper (120') (as shown in figure la), and the knife blade (20) is moved to the operating knife position (20b 1 ) to press on a fold line (60') of the received intermediate item (50').
  • the folding rollers (40a' and 40b') are rotated to fold the intermediate item (50') and move the folded intermediate item (50') through a roller gap (61') between the folding rollers (40a' and 40b').
  • the non-operating knife position (20a') is a position of the knife blade (20') at which the knife blade (20') is not in physical contact with the intermediate item (50').
  • the folding rollers (40a' and 40b') rotate at a definite tangential velocity (Vi), and the knife blade (20) actuates with a definite linear speed (V2), as shown in figure 1c.
  • the patent document US2012302415A1 discloses a knife folding machine having a support surface, a pair of folding rollers, a knife drive unit, a stopper, wherein the knife blade moves from a first position to a second position, and a sheet on a support surface gets folded in two by the knife blade.
  • the patent document EP1475338A1 discloses a knife folding machine which includes conveyor belts arranged at a distance from one another in a sheet running direction, a pair of folding rollers, a folding sword arranged in the sheet running direction for folding an incoming sheet, an end stop device downstream of the folding blade, wherein the folding sword actuates to fold the sheet and folding rollers fold the sheet.
  • An object of the present invention is to provide a system for operating a knife folder.
  • Further object of the present invention is to provide a system for operating a knife folder, which reduces wear and tear of intermediate items such as paper during folding operation.
  • Another object of the present invention is to provide a system for operating a knife folder, which reduces errors in folding intermediate items.
  • Yet another object of the present invention is to provide a system for operating a knife folder, which is simple in construction and cost-effective.
  • the present invention relates to a system for operating a knife folder.
  • the knife folder includes a knife blade and one or more pairs of folding rollers.
  • the knife folder performs the folding of intermediate items such as paper.
  • the knife blade is operated by a first driving unit.
  • the first driving unit is a linear actuator such as a pneumatic, or hydraulic or electromechanical or piezoelectric or cam operated actuator.
  • the first driving unit is a cam-operated linear actuator coupled to a motor.
  • the knife blade actuates at a definite magnitude of linear speed, and the folding rollers rotate at a definite magnitude of tangential velocity.
  • the folding rollers are operated by a second driving unit coupled thereto.
  • the second driving unit is a rotary actuator such as a servomotor or a stepper motor.
  • the first driving unit actuates the knife blade between a nonoperating knife position and an operating knife position to fold the intermediate item.
  • the non-operating knife position is the knife blade's position at which the knife blade is not in physical contact with the intermediate item.
  • the intermediate item is folded along a fold line. Due to the rotation of the folding rollers, the intermediate item is made to pass through a roller gap between the folding rollers.
  • the system includes one or more speed sensors arranged either with the folding rollers or with the knife blade.
  • the speed sensor is arranged with the folding rollers.
  • the speed sensor is arranged with the knife blade.
  • the speed sensor is a rotary encoder or a magnetic rotational speed sensor or a tachometer or a Hall effect sensor.
  • the speed sensor detects either the tangential velocity of the folding rollers or the linear speed of the knife blade during the movement of the knife blade towards the operating knife position. In an embodiment of the system, the speed sensor detects the tangential velocity of the folding rollers.
  • the system includes a control unit.
  • the control unit is a microcontroller, microprocessor, controller, processor, or logic controller.
  • the control unit is coupled to the speed sensors, the first driving unit, and the second driving unit.
  • the speed sensors send(s) information about either the magnitude of the tangential velocity of the folding rollers or the magnitude of the linear speed of the knife blade to the control unit.
  • the control unit receives input from the speed sensors in the form of an electric signal.
  • the control unit analyses the signal received from the speed sensor and sends an output signal to the control unit to actuate either the first driving unit to control the linear speed of the knife blade based on the tangential velocity of the folding rollers or actuate the second driving unit to control the tangential velocity of the folding rollers based on the linear speed of the knife blade.
  • the speed sensor sends the information about the rotational velocity of the folding rollers to the control unit, and the control unit actuates the first driving unit to control the linear speed of the knife blade based on the rotational velocity of the folding rollers.
  • the control unit controls the linear speed of the knife blade by reducing a difference between the tangential velocity of the folding rollers and the linear speed of the knife blade.
  • the speed sensor sends the information about the linear speed of the knife blade to the control unit, and the control unit actuates the second driving unit to control the tangential velocity of the folding rollers based on the linear speed of the knife blade.
  • control unit controls the rotational velocity of the folding rollers by reducing a difference between the tangential velocity of the folding rollers and the linear speed of the knife blade.
  • the present invention discloses a method for operating the knife folder.
  • the speed sensor detects the tangential velocity of folding rollers.
  • the speed sensor sends information about the magnitude of the tangential velocity of the folding rollers to the control unit, and in the last step, the control unit actuates the first driving unit to control the linear speed of the knife blade from the non-operating knife position to the operating knife position based on the tangential velocity of the folding rollers.
  • the present invention relates to an embodiment of a method for operating the knife folder.
  • the speed sensor detects the linear speed of the knife blade during movement towards the operating knife position.
  • the speed sensor sends information about the magnitude of the linear speed of the knife blade to the control unit.
  • the control unit actuates the second driving unit to control the tangential velocity of the folding rollers based on the linear speed of the knife blade from the non-operating knife position to the operating knife position.
  • the speed sensor detects the tangential velocity of the folding rollers and sends the information to the control unit.
  • the control unit analyses the information received from the speed sensor and actuates the first driving unit to control the linear speed of the knife blade to match the magnitude of linear speed with the magnitude of the tangential velocity.
  • the speed sensor detects the linear speed of the folding rollers and sends the information to the control unit.
  • the control unit analyses the information received from the speed sensor and actuates the second driving unit to control the tangential velocity of the folding rollers to match the magnitude of the tangential velocity with the magnitude of the linear speed.
  • Figure la shows a schematic diagram of a knife folder having a knife blade at a non-operating knife position in accordance with the present invention (Prior art);
  • Figure lb shows a schematic diagram of a knife folder having a knife blade at an operating knife position in accordance with the present invention (Prior art);
  • Figure 1c shows a schematic detailed view of the knife folder shown in figures la and lb;
  • Figure 2 shows a schematic view of an embodiment of a system for operating a knife folder in accordance with the present invention
  • Figure 3 shows a schematic view of one more embodiment of a system for operating a knife folder in accordance with the present invention
  • Figure 4 shows a schematic view of one more embodiment of a system for operating a knife folder in accordance with the present invention
  • Figure 5 shows a flow chart for an embodiment of a method for operating a knife folder in accordance with the present invention.
  • Figure 6 shows a flow chart for an embodiment of a method for operating a knife folder in accordance with the present invention.
  • the disclosed embodiments are merely exemplary of the invention, which may be embodied in various forms.
  • the present invention relates to a system for operating a knife folder.
  • the system improves the operation of folding intermediate items, which reduces the possibility of wear and tear of the intermediate items due to the relative velocity of the folding rollers and knife blade. Also, the system provides compact folds and reduce error in final outserts or inserts.
  • FIGS. 2, and 3 show various embodiments of systems (100a, 100b, 100c) for operating a knife folder (100) in accordance with the present invention is illustrated.
  • the knife folder (100) includes a knife blade (20) and one or more pairs of folding rollers (40a and 40b), as shown in figures 2 and 3.
  • the knife folder (100) performs folding of intermediate items (50) such as paper (as shown in figures 2 and 3).
  • the knife blade (20) is operated by a first driving unit (21), as shown in figures 2 and 3, 4.
  • the first driving unit (21) is a linear actuator such as a pneumatic, hydraulic, electromechanical, piezoelectric, or cam operated actuator.
  • the first driving unit (21) is a cam-operated linear actuator coupled to a motor.
  • the knife blade (20) actuates at a definite magnitude of linear speed (V2), and the folding rollers (40a and 40b) rotate at a definite magnitude of the tangential velocity (VI).
  • the folding rollers (40a and 40b) are operated by a second driving unit (22) coupled.
  • the second driving unit (22) is a rotary actuator such as a servomotor or a stepper motor.
  • the first driving unit (21) actuates the knife blade (20) between a non-operating knife position (20a) and an operating knife position (20b) (as shown in figures 2 and 3) to fold the intermediate item (50).
  • the non-operating knife position (20a) is a position of the knife blade (20) at which the knife blade (20) is not in physical contact with the intermediate item (300), as shown in figure 2 and 3.
  • the intermediate item (50) is folded along a fold line (60). Due to the rotation of the folding rollers (40a and 40b), the intermediate item (50) is made to pass through a roller gap (61) between the folding rollers (40a and 40b).
  • the system (100a, 100b) includes one or more speed sensors (80a/80b) arranged either with the folding rollers (40a and 40b) or with the knife blade (20), as shown in figures 2 and 3.
  • the speed sensor (80a) is arranged with the folding rollers (40a and 40b), as shown in figure 2.
  • the speed sensor (80b) is arranged with the knife blade (20), as shown in figure 3.
  • the speed sensor (80a) is a rotary encoder, a magnetic rotational speed sensor, a tachometer, or a Hall effect sensor.
  • the speed sensors (80a, 80b) detects either the tangential velocity (VI) of the folding rollers (40a and 40b) or the linear speed (V2) of the knife blade (20) during movement of the knife blade (20) towards the operating knife position (20b).
  • the speed sensor (80a) detects the tangential velocity (VI) of the folding rollers (40a and 40b) and in the embodiment of the system (100b), the speed sensor (80b) detects the linear speed (V2) of the knife blade (20), as shown in figure 3.
  • the system (100a, 100b) includes a control unit (90).
  • the control unit (90) is a microcontroller, microprocessor, controller, processor, or logic controller.
  • the control unit (90) is coupled to the speed sensors (80), the first driving unit (21), and the second driving unit (22), as shown in figures 2 and 3.
  • the speed sensors (80a, 80b) send(s) information about either the magnitude of the tangential velocity (VI) of the folding rollers (40a and 40b) or the magnitude of the linear speed (V2) of the knife blade (20) to the control unit (90).
  • the control unit (90) receives input from the speed sensor (80a or 80b) in the form of an electric signal.
  • the control unit (90) analyses the signal received from the speed sensor (80a or 80b) and sends an output signal to the control unit (90) to actuate either the first driving unit (21) to control the linear speed (V2) of the knife blade (20) based on the tangential velocity (VI) of the folding rollers (40a and 40b) or actuates the second driving unit (22) to control the tangential velocity (VI) of the folding rollers (30) based on the linear speed (V2) of the knife blade (20).
  • the speed sensor (80a) sends the information about the rotational velocity of the folding rollers (40a and 40b) to the control unit (90) and the control unit (90) actuates the first driving unit (21) to control the linear speed of the knife blade (20) based on the rotational velocity of the folding rollers (40a and 40b).
  • control unit (90) controls the linear speed (V2) of the knife blade (20) by reducing a difference (V2 - VI or VI - V2) between the tangential velocity (VI) of the folding rollers (40a and 40b) and the linear speed (V2) of the knife blade (20).
  • the folding rollers (40a and 40b) rotate at 1000 RPM.
  • the folding rollers (40a and 40b) have diameters of magnitude 5 cm each.
  • the speed sensor (80a) detect the revolutions per minute of the folding rollers (40a and 40b) and sends a signal to the control unit (90).
  • the control unit (90) calculates the tangential velocity (VI) of the folding rollers (40a and 40b) by taking input as RPM by using the following mathematical relation: , 2.61 m/s
  • the control unit (90) Based on the value of the tangential velocity (VI), the control unit (90) sends a signal to the second driving unit (22), and the second driving unit (22) makes the linear speed (V2) of the knife blade (20) equal to 2.61 m/s.
  • the speed sensor (80b) sends the information about the linear speed (V2) of the knife blade (20) to the control unit (90) and the control unit (90) actuates the second driving unit (22) to control the tangential velocity (VI) of the folding rollers (40a and 40b) based on the linear speed of the knife blade (20).
  • control unit (90) controls the rotational velocity (VI) of the folding rollers (40a and 40b) by reducing a difference (V2 - VI or VI - V2) between the tangential velocity (VI) of the folding rollers (40a and 40b) and the linear speed (V2) of the knife blade (20).
  • the system (100c) includes a user interface (110) configured over the control unit (90), as shown in figure 4.
  • the user interface (110) can be a keypad, touch screen, or an adjusting knob.
  • the user interface (110) is adapted to receive information about either the linear speed (V2) of the knife blade (20) or the tangential velocity (VI) of the folding rollers (40a and 40b) from a user.
  • the user operating the system (100c) enters the value of either the magnitude of the linear speed (V2) or the tangential velocity (VI) based on the observation of slippage of the intermediate item (50) during the folding operation, i.e. if there is slippage due to difference in values of VI and V2, the user can adjust the values of VI and V2 by entering input values through the user interface (110) and the control unit (90) actuates the first driving unit (21) and the second driving unit (22) to achieve the values of the linear speed (V2) and the tangential velocity (VI) as entered through the user interface (110).
  • FIG 5 a a method (200a) for operating the knife folder (100) is illustrated in accordance with the present invention.
  • the method (200a) is explained along with the system (lOOa/lOOb/lOOc).
  • the method (200a) starts from step 201.
  • the speed sensor (80a) detects the tangential velocity (VI) of folding rollers (40a and 40b).
  • the speed sensor (80a) sends information about the magnitude of the tangential velocity (VI) of the folding rollers (30) to the control unit (90).
  • control unit (90) actuates the first driving unit (21) to control the linear speed (V2) of the knife blade (20) from the non-operating knife position (20a) to the operating knife position (20b) based on the tangential velocity (VI) of the folding rollers (40a and 40b).
  • the method (200a) ends at step 205.
  • FIG. 5b a method (200b) for operating the knife folder (100) is illustrated in accordance with the present invention.
  • the method (200b) is explained along with the system (lOOa/lOOb/lOOc).
  • the method (200b) starts from step 206.
  • the speed sensor (80b) detects the linear speed (V2) of the knife blade (20) during movement towards the operating knife position (20b).
  • the speed sensor (80b) sends information about the magnitude of the linear speed (V2) of the knife blade (20) to the control unit (90).
  • the control unit (90) actuates the second driving unit (22) to control the tangential velocity (VI) of the folding rollers (40a and 40b) based on the linear speed (V2) of the knife blade (20) from the non-operating knife position (20a) to the operating knife position (20b).
  • the method (200b) ends at step 210.
  • the speed sensor (80a) detects the tangential velocity (VI) of the folding rollers (40a and 40b) and sends the information to the control unit (90).
  • the control unit (90) analyses the information received from the speed sensor (80a) and actuates the first driving unit (21) to control the linear speed (V2) of the knife blade (20) to match the magnitude of linear speed (V2) with the magnitude of the tangential velocity (VI).
  • the speed sensor (80b) detects the linear speed (V2) of the folding rollers (40a and 40b) and sends the information to the control unit (90).
  • the control unit (90) analyses the information received from the speed sensor (80b) and actuates the second driving unit (22) to control the tangential velocity (VI) of the folding rollers (40a and 40b) to match the magnitude of the tangential velocity (VI) with the magnitude of the linear speed (V2).
  • the present system (100a, 100b) provides an advantage of real-time control of the operating parameters of the folding rollers and the knife blade to avoid slippage of the intermediate items during folding, thereby reducing damage to the intermediate item. Also, the system (100a, 100b) provides a simple and cost-effective solution for producing compact folds with minimum errors. [0078]
  • the foregoing descriptions of specific embodiments of the present invention have been presented for purposes of illustration and description. They are not intended to be exhaustive or limit the present invention to the precise forms disclosed, and obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described to explain best the principles of the present invention and its practical application and to thereby enable others skilled in the art to best utilize the present invention and various embodiments with various modifications as are suited to the particular use contemplated.

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  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)

Abstract

La présente invention concerne un système (100a) permettant de faire fonctionner une plieuse à couteau (100). Les plieuses à couteau (100) existantes impliquent une vitesse de fonctionnement constante de rouleaux de pliage (40a et 40b) et d'une lame de couteau (20). Le système (100a) comporte un capteur de vitesse (80a) relié aux rouleaux de pliage (40a et 40b), une unité de commande (90), une première unité d'entraînement (21) actionnant la lame de couteau (20) et une seconde unité d'entraînement (22) actionnant les rouleaux de pliage (40a et 40b). Le capteur de vitesse (80a) détecte une vitesse tangentielle (V1) des rouleaux de pliage (40a et 40b), et l'unité de commande (90) commande une vitesse linéaire (V2) de la lame de couteau (20). Le système (100a) offre l'avantage de commander des paramètres de fonctionnement des rouleaux de pliage (40a et 40b) et de la lame de couteau (20) afin de réduire le glissement de l'article intermédiaire (50) pendant le pliage. Par ailleurs, la présente invention concerne un procédé (200a) permettant de faire fonctionner une plieuse à couteau (100).
PCT/IB2023/050897 2022-02-02 2023-02-02 Système de fonctionnement d'une plieuse à couteau WO2023148640A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN202221005614 2022-02-02
IN202221005614 2022-02-02

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WO2023148640A1 true WO2023148640A1 (fr) 2023-08-10

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2527279A1 (fr) * 2010-01-18 2012-11-28 Horizon International Inc. Dispositif de pliage à couteaux
EP3508632A1 (fr) * 2016-08-31 2019-07-10 Seiko Epson Corporation Dispositif de fabrication de feuille, et procédé de commande de dispositif de fabrication de feuille

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2527279A1 (fr) * 2010-01-18 2012-11-28 Horizon International Inc. Dispositif de pliage à couteaux
EP3508632A1 (fr) * 2016-08-31 2019-07-10 Seiko Epson Corporation Dispositif de fabrication de feuille, et procédé de commande de dispositif de fabrication de feuille

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